you can give us direction. by way of background, i put a slide up if sfgtv folks could go to the overhead for me. it shows, it shows our hetch hetchy annual generation. and, you know, we have 90 years worth of data that we're relying on to project forward. this slide shows you both the actual hetchy generation in the blue bars. the wet year projection, what we refer to as a wet year, what we refer to as normal year here in the green dash line. and then dry year. we use those same scenarios for our budget planning and financial planning. we set the budget every -- on our budget cycle every two years, assuming a normal generation year, a normal water year. of course, there are exceptions to that which this slide shows. so, the act requires that we -- that we start in calendar year 2011 meet 100% of our retail energy needs from hetch hetchy and rps eligible resources on a calendar year basis. it does have some limited exceptions and i'll describe those to you. what that means to us, sort of the simple math which i